Rough Grinding; Cutting Stone - Bosch GWS 7-115 Manual De Instrucciones

Operating Instructions
Clamp the workpiece if it does not remain
stationary due to its own weight.
Do not load the machine so heavily that it
comes to a standstill.
Roughing and cutting discs become very
hot while working; do not touch until they
have cooled.

Rough Grinding

With an approach angle of 30° to
40°, the best roughing results can
be achieved. Move the machine
back and forth with moderate pres-
sure. In this manner, the work piece
will not become too hot, does not
discolour and no ridges are formed.
Never use a cutting disc for roughing.
Flap disc
With the flap disc (optional extra), curved sur-
faces and profiles (contour sanding) can be
worked.
Flap discs have a considerably higher service life
than sanding sheets, lower noise level and lower
sanding temperatures.
Cutting
When cutting, do not press, tilt or
oscillate. Work with moderate ad-
vancing that is adapted to the mate-
rial being worked.
Do not brake coasting cutting disks with side
pressure.
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Important is the direc-
tion in which cutting is
performed.
The machine must al-
ways work opposite
to the direction of ro-
tation. Therefore,
never move the ma-
chine in the other di-
rection! Otherwise,
the danger exists of it
being pushed uncon-
trolled out of the cut.
Cutting grinder Stand
With the cutting grinder stand 18 (optional extra),
work pieces of the same length can be cut at an-
gles of 0 to 45°.
When cutting profiles and square pipes, it is best
to start with the smallest cross section.

Cutting Stone

The machine must be used only for dry cut-
ting/grinding.
The machine must be operated only with dust ex-
traction. In addition, wear a dust mask.
Slide the machine with moderate advancing that
is adapted to the material to be worked (Figure).
For cutting especially hard material, e. g., con-
crete with high gravel content, the diamond cut-
ting disc can overheat and become damaged as
a result. This is indicated clearly by a ring of
sparks that rotates with the diamond cutting disc.
In this case, interrupt the cutting process and al-
low the diamond cutting disc to cool by running
frely at no-load speed for a short time.
Noticeable decreasing work progress and a rotat-
ing spark ring are indications of a diamond cutting
disc that has become dull. With brief cuts in an
abrasive material (e. g., chalky sand stone), it can
be sharpened again.
It is best to work with
a diamond cutting
disc. To ensure
against tilting, the
cutting guide 21
with special protec-
tive vacuuming hood
must be used.
The vacuum cleaner
must be approved for
the extraction of ma-
sonry dust.
Bosch provides suita-
ble vacuum cleaners.
Switch on the ma-
chine and place the
front part of the cut-
ting guide on the
workpiece.
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